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Ok, this dude came up to me, he was homeless, and he asked me if he could use H2O2 in spore syringes to avoid contaminants (he was rather dirty). I thought, this seems interesting, I'll ask on Shroomery. So does H2O2 have any negative effects on spores? What would be an ideal amount to use (H2O2/H2O ratio)?

Just so you know, people using peroxide in their substrates are innoculating with mycelleum, not with spores. Mycelleum produces peroxidase (sp?) which breaks down H202. But like Jr says above, peroxide will kill your spores. -MM

--------------------There are more important things in life than just being really, really, ridiculously good looking. -Zoolander